Confirmed via the official website’s article on the merits of the new Six Samurai.

• Grandmaster of the Six Samurai
• Six Samurai United

both get reprints and are confirmed alongside the previously confirmed:

• Legendary Six Samurai – Kizan
• Legendary Six Samurai – Shi En
• Shadow of the Six Samurai – Shien
• Gateway of the Six
• Shien’s Smoke Signal

Source